1.1 Respondent selection.

1.2 Interview technique.

1.3 Identification of organizations.

1.4 Focus group methodology.

1.5 Key informant interview technique.

Table S1. In-degree centrality measures for all members of the SILMMA governance network and non-member agencies that are involved in coastal ecosystem governance in Solomon Islands and directed betweenness centrality measures for SILMMA member agencies only.

Table S2. The size of SILMMA member agencies and the number and proportion of people interviewed. The sum of years the respondents had worked in coastal ecosystem management.

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